Greensand core



July 22, 1930. w, s ANDERSON 1,771,201

' GREENSAND com;

Filed Nov. 25, 1925 2 Sheets-Sheet 1 WALTER $.ANDER SON.

I N VEN TOR.

BY W M A TTORNEY.

w. s. ANDERSON 1,771,201

WALTf/P 6. A/vmEA Jo/v ATTORNEY Patented July 193i) WALTER 8 ANDERSON, OF

PATENT oFF1cE DETROIT, MICHIGAI T, ASSIGNOB TO EARL HOLLEY, OF

DETROIT, MICHIGAN onnnnsmn on1:

Application 111m November as, 1925. Serial m. 71,887.

This invention relates to an improved pis ton core adapted to be used in conjunction with the mold disclosed in the U. S. patent to Dostal and Walter S. Anderson #1,584,018,

5 which shows a divided metal mold having a dry sand core supported from below. A bottom gate is used, the sprue being located in the vertical parting face of the divided mold.

In the application referred to, a shoulder is provided for locating a dry sand core con centrically within the mold. If an attempt is made to substitute a green sand core for the dry sand core this shoulder is no longer suitable, because the material of which the core is'made is not sufliciently strong to withstand the'handlin necessary to locate it in place. The speci 0 object of the invention is to provide locating means more durable than the core body, whereby the core may be held positively within'the mold. An additional object is to enable metals of all kinds to be used with green sand cores and specifically to permit iron to be poured into the mold without destro ing the core.

In Fi ure 1 show a cross sectional elevation of t e core. 7

Figure 2 shows, in cross sectional elevation through the molds, the core in place, the section being taken in plane 2-2 Figure 4.

Figure 3 shows the face of the mold with the core in place and the matrix of the mold full of iron, the core and the matrix being in section.

Figure 4, is a horizontal section of the mold taken asplane 4-4 of Figure 3.

In the figures, A is the greensand core, B is an extension therefrom, D D are the two halves of the mold, E is a circumferential sprue passage communicating through the passages F F with the matrix of the mold. H is a shoulder projecting from the molds D D, and G is a corresponding groove in the iron sleeve C. A plate J is bolted at K to the mold D so as to form a supporting shelf.

molds when in the open position. The mold is slid into place, being supported .by the plate J which projects from the mold D. The groove G engages withthe shoulder H and the core is thus supported while the other half In operation. the cores are placed in the of the mold D is closed upon the mold D. The shoulder H then enters the groove G and the core is thus aligned concentrically within the mold cavity. Thecore is protected from the erosion of the flowing metal from the gate by the fact that the impact of the flowing metal is taken by the metal core support C.

What I claim is 1. The combination of a divided metal mold having a substantially vertical parting face and core therefor comprising a metal core support, a green sand core supported thereon and connected thereto, means in the lower portion of said mold for engaging said core support, a gate in said mold extending around said metal core support, a passage in the parting face of said mold leading down into said gate, an outlet from said gate leading up into the matrix of the mold over said core whereby the mold may be filled from the bottom without the core being subjected at any point to the direct impact of the entering stream of molten metal.

2. The combination of a divided. metal mold having a substantially vertical parting face and core therefor comprising a permanent core support which can be used repeatedly, a green sand core supported thereon and connected thereto, means in said mold for engagin said core support, a gate in said mold exten ing around said core support a passage in the parting face ofsaid mold leading down into said gate, an outlet from said gate leading into the matrix of the mold over said core whereby,-the mold may be filled without the green sand core being subjected at any point to the direct impact of the entering stream of molten metal. 1

In testimony whereof I 'afiix my signature.

-. WALTER S. ANDERSON. 

